lkml.org 
[lkml]   [2011]   [Nov]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [GIT PULL rcu/next] RCU commits for 3.1
On Mon, Nov 07, 2011 at 06:09:49PM +0100, Peter Zijlstra wrote:
> On Mon, 2011-11-07 at 08:56 -0800, Paul E. McKenney wrote:
> >
> > If this really is a false positive, what should be used to get rid of
> > the splats?
>
>
> Probably something slightly less horrid than the below.. ;-)

Hmmm... Could the "1" below be replaced by the task's reference count?
Probabilistic, but should eventually catch it.

Thanx, Paul

> ---
>
> diff --git a/kernel/events/core.c b/kernel/events/core.c
> index d1a1bee..8f05201 100644
> --- a/kernel/events/core.c
> +++ b/kernel/events/core.c
> @@ -229,7 +229,7 @@ static void perf_ctx_unlock(struct perf_cpu_context *cpuctx,
> static inline struct perf_cgroup *
> perf_cgroup_from_task(struct task_struct *task)
> {
> - return container_of(task_subsys_state(task, perf_subsys_id),
> + return container_of(task_subsys_state_check(task, perf_subsys_id, 1),
> struct perf_cgroup, css);
> }
>
>



\
 
 \ /
  Last update: 2011-11-07 18:57    [W:0.095 / U:0.024 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site